The current price hike might have been caused by just one dude or a tight group of people buying up a lot of bitcoins in one go, probably due to Bitcoin having been declared Halal and compliant with the Sharia law (which requires a currency to have intrinsic value, by the way). But just as one swallow does not make a summer, one person (or even two persons) buying a heap of bitcoins can't change the market sentiment if it has been strongly negative for over three months, at least not at once. That's likely explains why you feel nervous right now, because deep inside you don't believe in Bitcoin's growth yourself.